Have pulsar timing array methods detected a cosmological phase transition?

被引：30

作者：

Addazi, Andrea ^{[1
,2
]}

Cai, Yi-Fu ^{[3
,4
]}

Marciano, Antonino ^{[2
,5
,6
,9
]}

Visinelli, Luca ^{[7
,8
]}

机构：

[1] Sichuan Univ, Coll Phys Sci & Technol, Ctr Theoret Phys, Chengdu 610065, Peoples R China

[2] INFN, Lab Nazl Frascati, Via E Fermi 54, I-00044 Frascati, Italy

[3] Univ Sci & Technol China, Sch Phys Sci, Deep Space Explorat Lab, Hefei 230026, Anhui, Peoples R China

[4] Univ Sci & Technol China, Sch Astron & Space Sci, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China

[5] Fudan Univ, Ctr Field Theory & Particle Phys, Shanghai 200433, Peoples R China

[6] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[7] Tsung Dao Lee Inst TDLI, 520 Shengrong Rd, Shanghai 201210, Peoples R China

[8] Shanghai Jiao Tong Univ, Sch Phys & Astron, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

[9] INFN, Sez Roma Tor Vergata, I-00133 Rome, Italy

来源：

PHYSICAL REVIEW D | 2024年 / 109卷 / 01期

基金：

国家重点研发计划; 美国国家科学基金会;

关键词：

DATA SET SEARCH; GRAVITATIONAL-RADIATION; VACUUM; SCALE; CONSTRAINTS; NOISE; DECAY;

D O I：

10.1103/PhysRevD.109.015028

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the recent detection of a gravitational wave (GW) background reported by various pulsar timing array (PTA) collaborations including NANOGrav-15 yr, PPTA, EPTA/InPTA, and CPTA can be explained in terms of first order phase transitions (FOPTs) from dark sector models (DSM). Specifically, we explore a model for first order phase transitions that involves the Majoron, a Nambu-Goldstone boson that is emerging from the spontaneous symmetry breaking of a U(1)L or U(1)B-L symmetry. We show how the predicted GW power spectrum, with a realistic choice of the FOPT parameters, is consistent with 1-sigma deviations from the estimated parameters of the background detected by the PTA collaborations.

引用

页数：7

共 91 条

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